*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001010
Feb001034
Mar017008
Apr019037800568
May6101684680010642
Jun11197212910020023
Jul3470502060009144
Aug1261154001172
Sep041958001962
Oct2360100606
Nov01150016
Dec001003646
Total6537144694304944201